To enrich resource of species, 105 arbor species (25 genera, 15 families) were introduced to the hilly and gully areas on Loess Plateau.

The optimization model used to compute the number of virtual connections in a many-category traffic in an ATM network component is useful in estimating the resource of nodal equipment and communication channels.

The developed method provides the permanent control over the appearance of mechanical injuries in metal constructions under loads, the location of these defects, and the estimation of the resource of their safe exploitation.

The violation of the general covariance is proposed as a resource of the gravitational dark matter.

The operating resource of the XeCl emitter is found to be (3-5)×104 pulses and depends strongly on the pressure and composition of the active medium.

The present investigation aims at introducing the distribution of medicinal plants in Northeastern China and makes an attempt to offer reference to the study of chinese medicine. About 2000 species of plants have been collected in this region from 1938 to 1955. Among these plants, 300-400 are of medicinal uses, of them 156 are famous indigenous drugs, such as: Panax ginseng C. A. Meyer, Ephedra distachya L., Glycyrrhiza uralensis Fischer, Gentiana scabra Bge., Schizandra chinensis Bail., Asarum sp., Aconitum...

The present investigation aims at introducing the distribution of medicinal plants in Northeastern China and makes an attempt to offer reference to the study of chinese medicine. About 2000 species of plants have been collected in this region from 1938 to 1955. Among these plants, 300-400 are of medicinal uses, of them 156 are famous indigenous drugs, such as: Panax ginseng C. A. Meyer, Ephedra distachya L., Glycyrrhiza uralensis Fischer, Gentiana scabra Bge., Schizandra chinensis Bail., Asarum sp., Aconitum spp., etc.. They are either very abundant in quantity or supreme in quality. Some of them are being cultivated in large scale. Investigation shows that the resource of medicinal plants in this region is very rich and requires further investigation.

The petroleum industry of China has been developing at high speed on the basis of self-reliance and the situation is excellent. The abundant resources of continental oil and gas originated from continental oil-source rocks which are characterized by their wide distribution in space and full development in time, with four main oilgenerating periods, namely, the late Permian, late Triassic, early Cretaceous and Palaeogene. Some of the basic geologic characteristics of the continental source rocks are. (1)...

The petroleum industry of China has been developing at high speed on the basis of self-reliance and the situation is excellent. The abundant resources of continental oil and gas originated from continental oil-source rocks which are characterized by their wide distribution in space and full development in time, with four main oilgenerating periods, namely, the late Permian, late Triassic, early Cretaceous and Palaeogene. Some of the basic geologic characteristics of the continental source rocks are. (1) the presence of large sedimentary basins for the accumulation and development of continental deposits and source rock series, (2) the development of source rock series formed in many periods and many sequences within continental deposits, (3) the continental source rock series consisting of many types of source formations, (4) the existence of depressions inside the continental sedimentary basins serving as the centres for accumulation of oil and gas. The chief originating conditions of the continental oil-source rocks are: (1) the presence and development of ancient lake basins being the pre-requisite for the formation of oil-source rocks, (2) abundant source matter serving as the material basis for the formation of source rocks, (3) the favorable preservation and transformation of source material being the conditions requisite for the origin of source rocks. It has been proved through practice that not only petroleum but also large petroleum fields can be formed in continental sedimentary basins. China's developing petroleum industry will certainly score still greater victories under the guidance of Chairman Mao's revolutionary line.

In view of the fact that in our country abound with natural resources of alkali-metaloxides containing minerals and rocks, mineral waste of mining and metallurgical indu-stries etc, the perspective of the enlargement of structure of raw materials in glass in-dustry has been discussed. It is suggested that, according to the characteristics of chemi-cal compositions of natural alkali-metal oxides containing mineral materials, it will beconvenient to transform partially the traditionally applied Na_2O-CaO-SiO_2...

In view of the fact that in our country abound with natural resources of alkali-metaloxides containing minerals and rocks, mineral waste of mining and metallurgical indu-stries etc, the perspective of the enlargement of structure of raw materials in glass in-dustry has been discussed. It is suggested that, according to the characteristics of chemi-cal compositions of natural alkali-metal oxides containing mineral materials, it will beconvenient to transform partially the traditionally applied Na_2O-CaO-SiO_2 system in glassindustry into Na_2O-Al_2O_3-SiO_2 system. Some problems such as the rational choice of che-mical composition of glasses, the application of complex refining agents etc, are studied.As a result of the author's researches, it is not necessary to melt high alumina-con-taining glasses at the temperature higher than that of glasses based on the Na_2O-CaO-SiO_2 system. On the basis of their viscosity-temperature curves, the forming and anneal-ing temperatures of high alumina-containing glasses must be adjusted correspondingly. Somephysico-chemical properties of glasses based on Na_2O-Al_2O_3-SiO_2 system have been des-cribed.